SandTimer.cpp

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* Copyright (c) 2018 Elhay Rauper
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#include "SandTimer.h"

SandTimer::SandTimer() {started_ = false;}

/* start timer. if already started, do nothing */
void SandTimer::start(unsigned long period)
{
    if (!started_)
    {
        period_ = period;
        start_time_ = millis();
        started_ = true;
    }
}

/* override original start time, and start timer again */
void SandTimer::startOver() 
{
    start_time_ = millis();
    if (!started_)
        started_ = true;
}

/* return true if timer has finished */
bool SandTimer::finished()
{
    if (started_)
    {
        end_time_ = millis();
        if (end_time_ - start_time_ >= period_)
        {
            started_ = false;
        }
    }
    return !started_;
}

void SandTimer::reset() {started_ = false;}